Thomas j



( No Model.)

T. J. BRAY.

DIE FOR FORGING PIPE OOUPLINGJB-LANKS.

No. 442,605. Patented Dec. 16, 1890.

Wifwema'en,

Inn e ware .T/Zmncw IBra Zy I c/itdo rid UNITED STATES PATENT OFFICE.

THOMAS J. BRAY, OF IVARREN, OHIO, ASSIGNOR OF ONE-HALF TO THE PAIGE TUBECOMPANY, OF SAME PLACE.

DIE FOR FORGING PIPE-COUPLING BLANKS.

SPECIFICATION forming part of Letters Patent No. 442,605, dated December16, 1890.

Application filed September 26, 1890. Serial No. 366,220- (No model.)

To all whom, it may concern:

Be it known that I, THOMAS J. BRAY, a citizen of the United States,residing at Warren, in the county of Trumbull and State of Ohio, haveinvented a certain new and useful Improvement in Dies for ForgingPipe-Coupling Blanks, of which the following is a specification.

My invention has relation to improved devices for producing blanksforpipe-couplings having a true interior of even diameter and anexterior largest at the center and tapering toward each end. These haveheretofore been forged on a mandrel by hand, which process is slow andexpensive and the blanks are not accurate in all cases.

The object of my invention is to overcome these objections and torapidly and perfectly form such blanks of uniform shape.

To this end my invention consists in providing dies of peculiar internalconfiguration for forming the blanks, adapted to be used with a drop,tilt,or steam hammer.

My invention is illustrated in the accompanying drawings, which form apart of this specification, in which similar letters of referenceindicate like parts, and in which Figure l is a perspective view of oneof the dies with a section of coupling-blank lying therein, and Fig. 2an internal view of a central longitudinal section of a completed blank.

The die-blocks A, one only of which is shown, are similar inconstruction and are arranged to be attached to the hammer and anvil inthe usual manner. Each block has an internal semicircular recess B, ofsuch configuration as to form the blank 0 of the form shown-that is,deepest in the center and thence tapering toward each end, where thecorners are preferably slightly rounded. At each end of this recess andin axial alignment with it are semicircular grooves D D of the sameinternal diameter as the blank 0.

In operation, the dies being placed in the hammer and arranged toregister accurately, the couplings of flat bar-iron orspecially-prepared bars are turned, brought to a welding heat, andplaced on a mandrel that forms the bore of the blank. The mandrelbearing the heated ring is then placed in the grooves D v D of the lowerdie, with the heated ring in the recess B, and the upper die being putin operation welds, swages, and shapes the ring to the desired blank.

I claim as my invcnti'on- Dies for forging pipe-coupling blanks, eachhaving a semicircularinternal recess adapted to shape the exterior ofthe blank, deepest at center and tapering toward and rounded at theends, with semicircular grooves in axial alignment with the recess toreceive the man drel on which the blank is forged, substantially asshown and described.

In testimony that I claim the above I hereunto set my hand.

'rnouAs J. BRAY.

In presence of- H. R. GILBERT, E. B. MoCRUM, Jr.

